Game Boy mock-up. Inspiration taken from Tenchu and Daikatana for the setting, Mega Man and Ninja Gaiden for (nonexistent!) gameplay. I wanted to make a mech too, cause the game would totally pit you against mechs. Even though the game sucked, Daikatana had a cool premise - ninjas fighting machines. Wicked.
The 5th color is just for transparency between the screens.